gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//mlir/examples/toy/Ch1/parser/AST.cpp",
    "//mlir/examples/toy/Ch1/toyc.cpp",
    "//mlir/examples/toy/Ch2/parser/AST.cpp",
    "//mlir/examples/toy/Ch2/toyc.cpp",
    "//mlir/examples/toy/Ch3/parser/AST.cpp",
    "//mlir/examples/toy/Ch3/toyc.cpp",
    "//mlir/examples/toy/Ch4/parser/AST.cpp",
    "//mlir/examples/toy/Ch4/toyc.cpp",
    "//mlir/examples/toy/Ch5/parser/AST.cpp",
    "//mlir/examples/toy/Ch5/toyc.cpp",
    "//mlir/examples/toy/Ch6/parser/AST.cpp",
    "//mlir/examples/toy/Ch6/toyc.cpp",
    "//mlir/examples/toy/Ch7/parser/AST.cpp",
    "//mlir/examples/toy/Ch7/toyc.cpp",
    "//mlir/lib/Analysis/DataFlowFramework.cpp",
    "//mlir/utils/clang-tidy/apply-clang-tidy.sh"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}